What does law enforcement recorder mean by circular recording?

Cyclic video recording of driving recorder means that driving recorder will cycle video recording. At present, all driving recorders are equipped with memory cards. The size of the memory card is generally in the range of 4G-32G. When the driving recorder cycles video recording, the stored video will increase continuously, and the capacity of the internal card will be occupied continuously.

When the memory card capacity of the driving recorder is full, the cyclic video recording function of the driving recorder will delete some videos with the longest recording time and interval to obtain new capacity, keep the continuous operation of the cyclic video recording function, and store the videos with new time.